Updated September 3, 2026. Quick answer: Teachers’ Retirement System of the State of Kentucky (KTRS): the COLA is automatic, a standard statutory 1.5% each July, service credit can be purchased, and no DROP was found. Vesting takes five years of Kentucky service.
Provisional. This page is published at medium confidence. The specific points that could not be confirmed are listed under What could not be verified below, and are named rather than smoothed over.
The verdicts
| Is the COLA granted? | Automatic (standard, statutory) |
|---|---|
| Is the COLA compounded? | Not stated |
| Vesting | 5 years of Kentucky service |
| Buy service credit? | Yes |
| DROP? | None found |
| State | Kentucky |
Those first two rows are separate questions and are routinely confused. Whether you get an increase at all is one thing; whether it compounds is another. A system can grant an increase automatically every year and still compute it against your original benefit forever, which is a materially worse deal than it sounds.
The COLA
“A standard, statutory 1.5% cost-of-living adjustment (COLA) is provided annually on July 1 to retirees who have been retired for at least one full year prior to July 1.” Retirees with under a year get a prorated share, the system’s own example: “if you retire on Jan. 1, you would receive only one-half of the COLA (0.75%) that would become effective on the following July 1.” Whether it compounds on the prior balance was checked on the official COLA page directly and is not stated there.
Buying service credit
KTRS offers an unusually long purchasable-service list: fractional service credit, current leave of absence (up to 3 years per 10-year period), military service after membership (up to 6 years, capped at service already earned), reinstatement of a refunded account, non-current leave of absence for pre-2008 hires, university salary credit, non-qualified service credit, up to 10 years of out-of-state service, other actuarial service (military, Peace Corps, Head Start, National Guard/reserve), and an Optional Retirement Plan conversion purchase. “The interest rate is 8% compounded annually” for most purchases; refunded-account redeposits cost “the amount withdrawn plus interest compounded annually from the withdrawal date to the redeposit date.”
Run your own numbers before deciding: some purchases never recover their cost, and the calculator shows which.
Coordinate this with your overall retirement plan
An adviser can help weigh a COLA that may not compound, a service-credit purchase that may never pay for itself, or a DROP election against the rest of your retirement plan, but that does not replace the numbers in your own member statement.
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Vesting
KTRS’s own credit-purchases guide states that out-of-state service credit counts the same as Kentucky service when calculating retirement benefits, except that “it does not count toward the five years of creditable Kentucky service required to be eligible for an annuity.” This confirms the 5-year Kentucky-service floor. The purchases guide also references 27 years of Kentucky service and age 60 in connection with out-of-state service purchase rules, but a clean statement of general retirement-eligibility criteria, including any service-credit threshold tied to age 60, was not found in the materials reviewed for this system.
DROP
No DROP mention appears anywhere in the credit-purchases guide or the KTRS pages searched this session.
DROP is rarer than it appears across the systems on this site: most have none.
What could not be verified
REFUND TERMS: this page does not state what happens to your contributions if you take a refund instead of leaving your account with the system: that comparison was not independently researched for this system this session, and is left as an open gap rather than guessed from another system’s rule. Consult your own plan’s refund/forfeiture terms before deciding. Any additional field marked “not stated” in the verdicts table above was genuinely absent from the official materials read, not omitted for space.
Sources
Read September 3, 2026.
Related public pension systems: Kentucky KERS · South Carolina SCRS.
General information drawn from each system’s own official published materials, not legal, tax or financial advice. Vesting, COLA and buyback rules are set by state statute and plan tier, differ materially by hire date, and can change by future legislation. This page cannot see your own member statement, which governs. We are not a law firm, a tax adviser, or a fiduciary, and this is not personalized advice.